web: Normalize client-side error handling (#13595)

web: Clean up error handling. Prep for permission checks.

- Add clearer reporting for API and network errors.
- Tidy error checking.
- Partial type safety for events.

web/src/user/user-settings/mfa/MFADeviceForm.ts

@@ -1,5 +1,5 @@
 import { DEFAULT_CONFIG } from "@goauthentik/common/api/config";
-import { SentryIgnoredError } from "@goauthentik/common/errors";
+import { SentryIgnoredError } from "@goauthentik/common/sentry";
 import "@goauthentik/elements/forms/HorizontalFormElement";
 import { ModelForm } from "@goauthentik/elements/forms/ModelForm";